<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			body {
				margin: 0px;
			}

			div {
				border: 2px solid red;
			}
			
			#div-top,#div-footer{
				height: 100px;
				text-align: center;
				/* line-height: 100px; */
			}
			
			#div-main{
				height: 400px;  /*此处待解决*/
			}
		</style>
	</head>
	<body>
		<div id="div-top">
			<img src="img/bg1.webp" height="60px"/>
			<strong>强调文本</strong>
		</div>
		<div id="div-main">
			<div>左侧</div>
			<div>内容</div>
			<div>右侧</div>
		</div>
		<div id="div-footer">底部</div>
	</body>
</html>
